How to consume virtual table with input parameter?

Dear all,

We have 2 HANA systems, the remote source has been configured in system B thru smart data access, so that I am able to create the virtual table in system B from a calculation view with an input parameter in system A:

CREATE VIRTUAL TABLE "SYSTEM_B_SCHEMA"."Z_VIRTUAL_TABLE" AT "SYSTEM_A"."NULL"."PUBLIC"."SYSTEM_A_SCHEMA::CA_VIEW";

I am also able to use select statement below to select data from the virtual table with input parameter:

SELECT * FROM SYSTEM_B_SCHEMA.Z_VIRTUAL_TABLE ('PLACEHOLDER' = ('$$INPUT_PARAMETER$$', 'abc'));

But when I was trying to create a calculation view in system B based on this virtual table, I do not see any place to maintain/map the input parameter.

Therefore I have below 2 questions:

1. If I create a calculation/analytic view based on a virtual table with input parameter, how to maintain/map the input parameter?

2. Is there any BW data provider (like virtual provider, open ODS view,etc) that can be built on a virtual table with input parameter? How to maintain the input parameter in the BW data providers?

Any post or document will be appreciated!

Thanks and best regards,

Tim